2S57 The Inheritance
The S in the model number indicated its having been designed for an S rotor. Only a few models would carry an S in the number. By 1960, the rotor type was dropped from the model number and surviving models renumbered.
2S57 The Inheritance
The
S in the model number indicated its having been designed for an
S rotor. Only a few models would carry an S in the
number. By 1960, the rotor type was dropped from the model number
and surviving models renumbered.